Double-cylinder sinking-pump.



PATENTEDY MAY 5.1903. E. M; GORYELL. I DOUBLE CYLINDER SINKING PUMP.

APPLIOATIOH FILED NOV. 22. 1901.

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E. M. OORYELL. I

DOUBLE CYLINDER SINKING PUMP.

APPLICATION IILED NOV. 22. 1901.

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NITED STATES.

Patented May 5, 1903.

EDWIN M. CORYELL, OF NEW YORK, N. Y., ASSIGNOR TO JULIA E. CAMERON, OF NEW YORK, N. Y.

DOUBLE-CYLINDER SINKlNG-PUMP.

SPECIFICATION forming part of Letters Patent No. 726,871, dated May 5, 1903. Application filed NovemherZZ, 1901. Serial No. 83,327. (No model.)

To ctZLwhom it may concern.-

Be it known that I, EDWIN M. CORYELL, of the city and State of'New York, have invented a new and useful Double-Cylinder Sinking-Pump, which invention is fully set forth in the following specification.

This invention relates to double-cylinder sinking-pumps, in particular vertical'pumps of this type intended for use in shafts of mines or other places difficult of accessf The invention consists, briefly, in providing two steam-cylinders with a single valve-. chest and valve common to both and in hav: ing a reversing device at the upper end only of each cylinder instead ofat each end of both the cylinders. p i

The invention consists, further, in certain details of construction that will be pointed out.

More particularly, the upstroke of the piston in each cylinder serves to reverse the common valve, cutting'off the admission of steam to while permitting its exhaust from the lower end of that cylinder and the upper end of the other cylinder and simultaneously cutting ofi the exhaust and admitting steam to the upper end of the former and'the lower end of the latter.

The invention will best be understood by reference to the accompanying drawings, which illustrate one embodiment of my invention.

Figure 1 is a horizontal section through lines 1 1 of Fig. 3. Fig. 2 is a partly-brokenaway horizontal section viewed from below through line 2 2 of Fig. 3. Fig. 3 is'a front elevation showing the valve-chest in section through line 1 1 of Fig. 1, and Fig. 4 is a dia: grammatic View to illustrate the relative ar: rangement of the various parts and the operation of the device as a whole 7 7 I Referringfirst to Fig. 4, A and B are the twosteam cylinders, O a portion of the castings forming part of the valve-chest and containing the various ports and passage-ways, andD isthe mainvalve; Valve D is located transversely across the upper portions of cylinders A and B. A and B are the two steampistons, which work in opposition to each :10 and exhaust-port 11.

leading to the exhaust-port 11 sure behind head (1 of the valve being thus well-known Cameron pump?"construction for shifting the main valve D by steam-pressure and are themselves lifted bythe upward stroke 1 of their respective main pistons.

Live steam having entered the space o 'within thevalve-chest passes through space 6 in the valve and thence down passage7, whence it branches by members 7 and 7"to the top of cylinder A and the bottom of cylinder B,

other, and a and b are tappet-valves of the of the heads d and d of the valve, and the pressure in these passages 20 and 21 would normally balance the valve D in whatever position it has assumed, while serving to hold the tappet-valves a and 1) down; but when either piston-say B, as in Fig. 1-has lifted its tappet-valve b then the latter cuts off admission of live steam through port 21 and at the same time opens an exhaust-passage 23,

The presrelieved, while the pressure continues on head dythe, valve D shifts to the right. Vice versa, when piston B descends and piston A ascends andlifts its tappet-valve a the admission of live steam through passage 20 is cut off and the steam behind head d is permitted to exhaust through passage 22 and port11,'whereby the valve D is shifted back 'tothe left, and so on continuously.

Referring now to Figs. 1,2,"a'nd] 3-, live steam enters at portl and fills-spaces 2, 3, and 4:, which constitute the entir'e space 5 within the valve-chest. In the position of valve D shown by Fig. l the steam passes from space 4 through space 6 and into passage 7, whence it branches through members 7 and 7 respectively, to the top of cylinder A and the bottom of cylinder B, as already indicated. Passage 7 is indicated by the heavy broken lines, and passage 7" is shown by full lines in Fig. 2 and indicated by heavy broken lines in Fig. 3. The exhaust from the bottom of cylinder-A passes up the passage 8', and the exhaust from the top of cylinder B passes out through passage 8, the two uniting in passage 8 to pass out through space 9 into passage 10 and port 11. Passage 8 is shown by full lines in Fig. 2 andindicated by heavy dotted lines in Fig. 3, and passage 8 is indicated by heavy dotted lines in all three figures.

Live steam passes behind the heads d and cl through the ports 20 and 21, respectively, which latter are controlled by the tappetvalves (1 and b, respectively, the steam entering the small passages 20-and 21 from the respective cylinders A and B. The pressure in passages 20 and 21 normally serves to hold the tappet-valves a and I) closed, (valve a being shown in Fig. 3 as in the closed position and valve 1) as opened;) but as each tappetvalve is in turn raised by its main piston (as valve 1) in Fig. 3) it cuts off the access of live steam through passage 21 or 20, while permitting the exhaust of the steam from behind head (1 through passage 23 and exhaust-port 11. In like manner when tappet-valve (t is raised by its piston A the admission of live steam through port 20 is cut ofii, and the steam behind head 01 exhausts through passage 20 and passage 22 into the exhaust-port 11.

The operation of the engines is obvious. As each piston in turn reaches the upper end of its cylinder it unseats its tappet-valve, thus opening the exhaust behind the adjacent end of the piston-head d or d, as the case may be, and the valve D is thereby shifted. Thereupon the live steam which has been entering (as through route 6 7 7") to lift the piston aforesaid and also (as through route 6 7 7) to carry down the other piston is cut off, and these passages 7 7 7are put into communication with the exhaust 11, as through space 10 and 9. Simultaneously the other passages, (as 8 8 and 8' 8,) which had been acting as exhausts, are now put into communication with live steam and conduct the latter below the bottom of the lower piston and upon the top of the other piston, thus reversing the strokes of the respective pistons, and so on in alternation, each piston at the end of its upstroke serving to shift the valve D and efiectuate the consequent admission and exhaust of steam for the opposite ends of both steam-cylinders.

It frequently happens that owing to difference in packing or other causes there is a want of absolute synchronism between the movements of the two pistons A and B. In

particular, if when a piston is descending the steam below it exhausts too rapidly the piston is liable to strike the lower cylinder-head I prevent this objectionable a severe blow.

pounding action by means of the adjustable device shown in Fig. 2. In each of the two passages 8 and 7", leading to the respective lower ends of the cylinders A and B,is located a lifting-valve M. This valve is guided by means of its sleeve m upon the prolongation of an adjustable (screw-threaded) bolt N. A projection m extends below valve M, abutting against a seat on the casting O, as shown. When the bolt N is screwed down as far as possible,the steam enters freely, (to raise the main piston,) and the exhaust-steam may likewise escape just as freely at the proper time; but when the bolt N is screwed up, while live steam may enter as freely as before, (pushing the valve M out of its way,) yet the exhaust-steam tends to raise the valve and impede the passage, (8 or 7",) and therefore makes its escape more slowly. By Varying the adjustment of the bolt N the time period of the exhaust can be varied to accommodate the strokes of the two pistons.

The particular arrangement and constructionhereinbefore set forth is but one manner of employing my invention. Changes may be made in the form and proportion and the idea may be embodied in other constructions and arrangements without departing from the spirit of my invention.

Having thus described my invention, 1 claim- 1. The herein-described double-cylinder steam-pump, consisting of the combination with two parallel steam-cylinders and a piston in each working in opposition to a piston in the other, of a single valve-chest and valve in connection therewith and arranged transversely thereto, two passage-ways leading from said valve-chest and each branching to the top of its cylinder and the bottom of the other cylinder, an exhaust-port opening from said valve-chest, said two passage-ways and said exhaust-port being controlled by said valve, two small passages for leading live steam behind each end of the piston-head of said valve for balancing the same by steampressure, and a tappet-valve located in the head of each steam-cylinder for controlling said last-named two small passages, and each tappet-valve being itself controlled by its adjacent piston and the steam in its adjacent small passage.

2. A double-cylindersteam-engine, consisting of the combination with two parallel steam-cylinders and a main piston in each working in opposition to a main piston in the other, of a single valve-chest common to the two, two steam-ports leading from said Valvechest and each branching to the top of its cylinder and the bottom of the other cylinder, an exhaust-port from said valve-chest, an auxiliary double-headed piston inclosed in said valvechest, a single slide-valve carried thereby that controls the two steam-ports and the exhaust-port aforesaid, a small passageway from the rear of each auxiliary piston-head aforesaid that branches to both the In testimony whereof I have signed this live-steam supplyand the exhaust, and a tapspecification in the presence of two subscribpet-valve located in the head of each oylining witnesses.

der and serving by itself alone to cut off its EDWIN M. CORYELL. 5 adjacent small passage-Way aforesaid alter- Witnesses:

nately from the live steam and from the eX- C. A. L. MASSIE,

haust, substantially as described. ELISHA K; CAMP. 

